CN215018304U - Aneurysm occlusion device - Google Patents

Abstract

The utility model provides an aneurysm blocking device, aneurysm blocking device is formed by an elasticity dictyosome, the near-end of elasticity dictyosome radially inwards draws in and is connected with a near-end mark portion, the distal end of elasticity dictyosome radially inwards draws in and is connected and reverse folding with a far-end mark portion for the distal end of the elasticity dictyosome at this far-end mark portion place stretches into inside the elasticity dictyosome, and the double-layer network structure that forms through this reverse folding constitutes the elasticity dictyosome of expansion portion, is not constituted neck elasticity dictyosome by reverse folding single-layer network structure, under the self-expanding state, the radial dimension of the elasticity dictyosome of expansion portion increases from the near-end to the distal end gradually, or increases earlier and reduces again. According to the utility model discloses, provide an occlusive device that can effectively treat aneurysm, overcome prior art shutoff effect not good, the operation cost is higher, the great problem of the operation degree of difficulty, can reduce arterial thrombosis's possibility, reduced the weak easy broken risk in tumour top again.

Description

Aneurysm occlusion device

Technical Field

The utility model relates to an aneurysm treatment technical field, more specifically relate to an aneurysm obturator.

Background

Intracranial aneurysm refers to localized bulging and dilatation of the vessel wall of an artery due to the action of acquired pathological factors or congenital malformations. Intracranial aneurysm has a very high incidence rate of about 5%, and its course is often more secret, rupture bleeding is often more sudden, and the fatality rate or disability rate is also high. The lethality rate of the first rupture bleeding is 8% -45%, the lethality rate in one year is higher than 60%, and the lethality rate in 2 years is more than 85%. Therefore, it is globally emphasized that early diagnosis and treatment of intracranial aneurysms is of great clinical importance to improve patient survival and quality of life.

At present, two standard treatment methods are available for cerebral aneurysm rupture bleeding, namely craniotomy clamping and endovascular interventional embolization. For a long time, the treatment of cerebral aneurysms has been dominated by craniotomy clamping procedures, which have the significant disadvantage that the surgeon has to sever the various tissues to reach the aneurysm, and to secure metal clips around the base of the aneurysm, so that the patient experiences a great deal of trauma in the area of the aneurysm. The recovery time after surgery is long and there is a possibility of epilepsy development after surgery. In recent years, with the progress of medical imaging and the continuous progress of interventional embolization technology, the application of interventional embolization is increasing, and about 85% of aneurysms in some european centers are currently treated with interventional embolization. The method is safe and effective for treating intracranial aneurysm by using an intravascular interventional therapy method for a specific patient, and the interventional embolization has the advantages of small pain, small wound, no need of vexation, short operation recovery period and complete intravascular operation, so that the quality of life of the patient can be improved, the death rate can be reduced, and the aim of healing can be fulfilled.

The common interventional therapy product in the market is provided with a spring ring, a liquid embolic agent, an auxiliary embolism, a blood flow guiding device, a covered stent and a tumor cavity internal blood flow device, wherein the spring ring, the liquid embolic agent and the tumor cavity internal blood flow device are all placed in the tumor cavity to fill the tumor cavity and interfere the tumor internal blood flow to form an embolism in the tumor so as to achieve the purpose of blocking the tumor cavity. The blood flow guiding device and the tectorial membrane bracket are both arranged in a blood vessel and interfere with blood flow entering the tumor or seal the tumor cavity to form embolism to seal the tumor cavity. However, occlusion of an aneurysm at a vessel bifurcation has been a troublesome problem, and embolization requires occlusion of the aneurysm without affecting parent blood flow. At present, a spring ring is commonly used for aneurysm at a bifurcation, but the spring ring has the defects of multiple packing, troublesome operation, difficult control of packing density, possibility of over-full or under-full packing, and difficulty in measuring the over-full state of the aneurysm; thus, there may be overfilling that causes the coil to burst into the parent artery, affecting blood flow and increasing the likelihood of arterial thrombosis. For wide-neck aneurysms, the spring ring may need to be placed and blocked with the assistance of a stent, so that the spring ring is prevented from falling off, and the operation cost and the placing operation difficulty are increased. The liquid embolic agent has high embolism rate, but extravasation and the occlusion of a perforator are serious complications of the liquid embolic agent, and the liquid embolic agent is rarely used as an intracavitary embolic agent for filling and treating intracranial aneurysm at present. The clinical application of the covered stent and the blood flow guiding device provides a new method for treating intracranial aneurysm, and becomes another innovation in the treatment history of intracranial aneurysm. The applicability is limited, and the aneurysm at the bifurcation position is not applicable. Intratumoral blood flow devices, which are spring ring extension products, such as Woven Endoluminal Bridge (WEB) devices, are designed for wide-neck and bifurcated aneurysm treatment and can interfere with intratumoral blood flow from the cervical level of the aneurysm to achieve the purpose of long-term occlusion.

According to the investigation, most of the existing blood flow devices in the tumor cavity are formed by weaving nickel-titanium alloy wires, are shaped into a spherical shape or a hemispherical shape, and support the neck or the inside of the tumor by utilizing the elasticity of a woven mesh, so that the device stays in the tumor and simultaneously blocks the neck of the tumor. However, these intratumoral blood flow devices still have many problems in clinical applications, including whether the sealing of the tumor neck is good, whether slippage occurs, whether the parent artery is occupied, whether visualization is available, whether porosity is adequate, whether delivery is feasible, etc.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an aneurysm blocking device to solve branching type aneurysm and be difficult to by the stable problem of shutoff of plugging device.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the aneurysm occlusion device is formed by an elastic net body, the near end of the elastic net body is radially inwards folded and connected with a near end mark part, the far end of the elastic net body is radially inwards folded and connected with a far end mark part and reversely folded, so that the far end of the elastic net body where the far end mark part is located extends into the elastic net body, a double-layer net structure formed by the reverse folding forms the elastic net body of an expansion part, a single-layer net structure which is not reversely folded forms the elastic net body of a neck part, and in a self-expansion state, the radial size of the elastic net body of the expansion part is gradually increased from the near end to the far end or is increased and then reduced.

It should be understood that "self-expanding state" herein refers to the state that the device assumes without any external force being applied by man.

According to the utility model provides a such aneurysm blocking device, can closely laminate the tumor neck and the tumor wall of aneurysm respectively through neck elasticity dictyosome and expansion portion elasticity dictyosome under the self-expanding state, realize the effective shutoff to aneurysm.

Furthermore, the device can be divided into a short neck occlusion device and a long neck occlusion device in different embodiments for adapting to different types of aneurysms, and the devices are distinguished according to different size ratios of the expansion part elastic net body and the neck part elastic net body. Wherein the short neck occluding device is more suitable for a narrow neck aneurysm and the long neck occluding device is more suitable for a wide neck aneurysm.

According to the utility model discloses a preferred scheme provides a short neck blocking device, and this short neck blocking device more is applicable to narrow neck aneurysm, and the main objective is for laminating the tumor chamber better, and narrow neck aneurysm's characteristic is that tumor neck department is narrow, and tumor neck department length is shorter, and the tumor intracavity becomes globular, cylinder calotte etc. and tumor chamber diameter is greater than tumor neck diameter. The utility model discloses the characteristics to the short neck blocking device of this narrow neck aneurysm design are that the length of neck elasticity dictyosome is shorter and the near-end levels, and the length of the elasticity dictyosome of expansion portion is longer.

In the case of the short neck occlusion device, the shape of the expanded portion elastic mesh body extending distally may be curved, linear, wavy, irregularly curved, or the like. The diameter of the elastic reticular body of the expansion part relative to the elastic reticular body of the neck part can be gradually increased or increased and then decreased. Preferably curved or straight.

For the short neck blocking device, the neck elastic net body can be attached to the neck of the aneurysm, the diameter of the neck elastic net body is larger than or equal to that of the neck of the aneurysm in a free state, the net body is a single-layer net body, and the section perimeter of the neck elastic net body is further larger than or equal to that of the neck of the aneurysm.

Preferably, the diameter of the neck elastic reticular body is more than or equal to 0.5 mm; the perimeter of the cross section is more than or equal to 1.5 mm. The length of the neck elastic reticular body is more than or equal to the height of the tumor neck, and is preferably more than 0.5 mm.

The shorter neck elastic net body can ensure the radial force and simultaneously be parallel and level or slightly convex on the parent artery, thereby improving the probability of completely sealing the neck opening at the later stage and simultaneously reducing the probability of forming thrombus in the parent artery. The elastic reticular body of the longer expansion part is in a spherical or columnar dome shape, is tightly attached to the tumor cavity and has micro-tension. The tension at the top of the tumor can be further reduced by increasing the radial tension at the middle position of the expansion part while providing the radial micro-tension. The diameter of the maximum position of the elastic reticular body of the expansion part is more than or equal to the maximum position of the tumor cavity, and the preferred diameter is more than or equal to 0.5 mm; the perimeter is more than or equal to 1.5 mm.

Because tumour top position weakest, the easy fracture, according to the utility model discloses an optimal scheme when distal end mark portion inwards sets up, more is favorable to reducing the broken risk that splits of tumour top, is fit for the application demand more.

In accordance with another preferred aspect of the present invention, a long neck occluding device is provided that is more suitable for wide neck aneurysms. Clinical carotid aneurysms mostly appear as dome-shaped columns or hemispheres, and the diameter of a tumor neck is usually the maximum outer diameter of a tumor cavity, namely, wide-necked aneurysm. The treatment of such aneurysms has been a very delicate problem in the industry, and conventionally requires a stent to be treated with a coil, but this increases the difficulty and expense of the operation. To this end, the present invention provides, inter alia, such a long-neck occlusion device specifically for wide-neck aneurysms. Different from the short-neck blocking device, the elastic net body for the neck of the long-neck blocking device is composed of a longer single-layer net body, so that more contact areas in the tumor cavity can be provided, and the tension of an opening section in the tumor cavity can be provided.

For the long-neck blocking device, the diameter of the elastic net-shaped body at the neck part is more than or equal to the diameter of the neck part of the tumor cavity, and the preferred diameter is more than or equal to 0.5 mm; the perimeter is more than or equal to 1.5 mm. The length of the neck elastic reticular body is more than or equal to 10 percent of the total tumor height, preferably more than or equal to 50 percent of the total tumor height.

Preferably, the cross-sectional perimeter of the expandable section elastic mesh body at the distal end of the long neck occlusion device is smaller, and the length of the expandable section elastic mesh body is less than or equal to 50% of the total tumor height, preferably less than or equal to 30% of the total tumor height.

The diameter of the maximum position of the elastic reticular body of the expansion part is more than or equal to the maximum size in the tumor cavity, and the preferred diameter is more than or equal to 0.5 mm; the perimeter is more than or equal to 1.5 mm. The diameter grow of distal end expansion portion elasticity dictyosome, the similar rabbit ear of outside expansion in cross-section for the elasticity of expansion portion is bigger, more is favorable to the support to stay in the straight tumour chamber of wide neck, and the holding power of distal end is less, reduces the cracked risk of tumour top.

According to a preferred aspect of the present invention, the aneurysm occlusion device further comprises a connecting wire for connecting the proximal end marking portion and the distal end marking portion, wherein when the connecting wire is provided, the proximal end and the distal end of the aneurysm occlusion device are better in shape retention, the support is relatively large, when the aneurysm occlusion device is stretched to form a pre-delivery elongated body, the proximal end of the elongated body is in a single-layer mesh shape, and the distal end is compressed in a double-layer mesh shape.

According to another preferred embodiment of the present invention, the proximal marker portion and the distal marker portion are not connected by a connecting wire, the proximal end and the distal end of the aneurysm occlusion device are relatively free, the supporting force is relatively small, and when the aneurysm occlusion device is stretched into an elongated body for pre-delivery, the whole aneurysm occlusion device is compressed in a single-layer mesh shape.

According to the utility model provides a such aneurysm obturator, neck elasticity dictyosome and expansion portion elasticity dictyosome can be woven by many wires or single wire rod is woven, or tubulose cutting, or obtain through sheet mould pressing. The elastic net-shaped body is composed of a plurality of diamonds, parallelograms or polygons which can be compressed. The reticular body material is elastic memory metal or polyester material or degradable material, such as degradable polyurethane, degradable polyester, poly (L-lactide-co-D-lactide), poly (L-lactide-co-D, L-lactide), poly (D-lactide-co-D, L-lactide), poly (lactide-co-glycolide), poly (lactide-co-epsilon-caprolactone) and poly (glycolide-co-epsilon-caprolactone).

Furthermore, according to the present invention, after the elastic mesh body is formed, the surface of the elastic mesh body can be attached with drugs, such as anti-rejection drugs, anti-platelet drugs, anti-coagulation drugs, anti-thrombosis drugs, and anti-inflammation drugs. The medicine can be coated on the surface of the reticular body by adopting the processes of spraying, dip coating, electrostatic adsorption and the like.

According to a preferred embodiment of the present invention, the proximal end of the elastic net-shaped body of the neck of the aneurysm occlusion device is folded radially inward to form a net-shaped body assembling portion in advance, and the proximal end marking portion is fixedly connected to the net-shaped body assembling portion of the proximal end of the elastic net-shaped body. The proximal marker may be shaped as a cylinder, or as a cylinder housing closed at one end, or as a wire. The proximal marker portions may be disposed one each outside or inside the collection of mesh bodies, or both. The fixed connection can be a press riveting mode, an adhesion mode, a welding mode, hot melting and the like. The proximal marker is made of a radiopaque material.

According to a preferred embodiment of the present invention, the distal end of the elastic mesh body of the expandable portion of the aneurysm occlusion device is radially inwardly gathered to form another mesh body assembly portion in advance, and the distal end marking portion is fixedly connected to the mesh body assembly portion at the distal end of the elastic mesh body. The distal marker may be shaped as a cylinder, or as a cylinder housing closed at one end, or as a wire. The distal marker portions may be provided one each outside or inside the mesh-like body assembly portion, or both. The fixed connection can adopt a press riveting mode, a bonding mode, a welding mode, hot melting and the like. The proximal marker is made of a radiopaque material.

According to a preferred embodiment of the present invention, when the proximal marker and the distal marker are connected by the connecting wire, the elastic mesh body is relatively self-expandable, and the elastic mesh body can be axially stretched into an elongated body which can be delivered or withdrawn along the inside of the micro-catheter; the near end of the slender body is of a single-layer net structure, and the far end of the slender body is of a double-layer net structure.

According to another preferred embodiment of the present invention, when the proximal marker portion and the distal marker portion are connected without a connecting wire, wherein the elastic mesh body is in a relatively self-expanding state, the elastic mesh body can be axially stretched into an elongated body, and the elongated body can be delivered or withdrawn along the inside of the microcatheter; the whole body of the slender body is of a single-layer net structure.

According to the utility model discloses, an intracavity blood flow device of treatment intracranial aneurysm is provided, to wide carotid aneurysm and narrow carotid aneurysm homoenergetic better support and shutoff, especially provide effectual support in the tumour neck, play the effect of similar stopper, and occupy the place less in carrying the parent artery, reduce arterial thrombosis's possibility, the device is comparatively reasonable at tumour intracavity tension, reduces or avoids the weak risk of easily breaking in tumour top.

To sum up, the utility model provides a can effectively treat occlusive device of aneurysm has overcome the not good, the higher, the great problem of the operation degree of difficulty of prior art shutoff effect, operation cost, can reduce arterial thrombosis's possibility, reduces again, has avoided the weak risk of easily breaking in tumour top even. Clinical research result shows that the aneurysm obturator can make intracranial aneurysm keep apart from the circulation fast according to the utility model provides a be superior to support supplementary spring coil to wide carotid aneurysm and bifurcation portion aneurysm embolism rate, provide effectual clinical basis for tumour intracavity blood flow device treatment wide carotid aneurysm and bifurcation portion aneurysm.

Drawings

FIG. 1 is a schematic structural view of a short neck occlusion device provided in accordance with a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a short neck occlusion device according to another preferred embodiment of the present invention;

FIG. 3 is a schematic structural view of a short neck occlusion device according to yet another preferred embodiment of the present invention;

FIG. 4 is a schematic structural view of a long neck obturator provided in accordance with another preferred embodiment of the present invention;

FIG. 5 is a schematic view of the long neck occluding device shown in FIG. 4 in a distal expanded state;

FIG. 6 is a schematic view of the short neck occlusion device of FIG. 2 in use;

fig. 7 is a schematic view of the long neck occlusion device of fig. 4 in use.

Detailed Description

The present invention will be further described with reference to the following specific embodiments. It should be understood that the following examples are illustrative of the present invention only and are not intended to limit the scope of the present invention.

In order to solve the problem that bifurcated aneurysm is difficult to be stabilized the shutoff by plugging device, the utility model provides an aneurysm blocking device, this aneurysm blocking device can provide effectual support in the tumour neck, plays the effect of similar stopper, and occupies an area less in carrying the parent artery, reduces arterial thrombosis's possibility, and this aneurysm blocking device is comparatively reasonable at tumour intracavity tension simultaneously, has reduced the weak risk of easily breaking in tumour top.

In order to realize the stable shutoff to narrow carotid aneurysm and wide carotid aneurysm respectively better, according to the expansion portion elasticity dictyosome and the difference of the size proportion of the neck elasticity dictyosome and distinguish, the utility model provides a two kinds of aneurysm plugging devices divide into short neck plugging device and long neck plugging device, and wherein short neck plugging device more is applicable to narrow carotid aneurysm, and long neck plugging device more is applicable to wide carotid aneurysm.

Referring to fig. 1, a short neck occlusion device 10 is provided in accordance with a preferred embodiment of the present invention. The device is formed by an elastic net body which is approximately cylindrical in an initial state and comprises: a proximal marker part 1, a neck elastic reticular body 2, an expansion part elastic reticular body 3, a distal marker part 4 and a connecting line 5. The neck elastic reticular body 2 is connected with the near-end marking part 1 by radially inwards folding at the near end, the neck elastic reticular body 2 extends to the far end along the axial direction and is connected with the far-end marking part 4 by radially inwards folding, the neck elastic reticular body 2 is of a double-layer reticular structure formed by reverse folding operation, and the neck elastic reticular body 2 is of a single-layer reticular structure which is not reversely folded. The short neck blocking device 10 is characterized in that the elastic net-shaped body 2 of the neck part is short and flat at the proximal end, and the elastic net-shaped body 3 of the expansion part is long.

In the short neck occlusion device 10, the elastic neck net 2 can be attached to the neck of an aneurysm, and the elastic neck net 2 has a diameter equal to or larger than the diameter of the aneurysm neck in a free state, and is a single-layer net, and further, the cross-sectional perimeter of the elastic neck net 2 is equal to or larger than the perimeter of the aneurysm neck.

Preferably, the diameter of the neck elastic reticular body 2 is more than or equal to 0.5 mm; the perimeter of the cross section is more than or equal to 1.5 mm. The length of the neck elastic reticular body 2 is more than or equal to the height of the tumor neck, and is preferably more than 0.5 mm.

The shorter neck elastic net-shaped body 2 can ensure the radial force and simultaneously is parallel and level or slightly convex on the parent artery, thereby improving the probability of completely sealing the neck opening at the later stage and simultaneously reducing the probability of forming thrombus in the parent artery. The elastic reticular body 3 of the longer expansion part is in a spherical or columnar dome shape, is tightly attached to the tumor cavity and has micro-tension.

The diameter of the maximum radial dimension position of the elastic reticular body 3 of the expansion part is more than or equal to the maximum radial dimension position of the tumor cavity, and the preferred diameter is more than or equal to 0.5 mm; the perimeter is more than or equal to 1.5 mm.

As shown in figure 1, the proximal marker portion 1 and the distal marker portion 4 are further connected by a connecting wire 5, and in a relatively self-expanding configuration, the elastic mesh body can be axially stretched into an elongated body to achieve delivery or withdrawal of the elongated body along the microcatheter, wherein the proximal end of the elongated body is a single-layer mesh structure, and the distal end of the elongated body is a double-layer mesh structure. When the connection between the proximal marker 1 and the distal marker 4 is achieved using the connecting wire 5, the proximal and distal shapes of the occluding device are better maintained and the support is relatively large.

According to another preferred embodiment of the present invention, as shown in fig. 2, the proximal marker 1 and the distal marker 4 are not connected by a connecting wire, and in the relative self-expanding configuration, the elastic mesh body can be axially stretched into an elongated body, so as to deliver or withdraw the elongated body along the microcatheter, and the entire elongated body is a single-layer mesh structure. When the connecting wire 5 is not connected, the proximal end and the distal end of the occlusion device are relatively free, the supporting force is relatively small, and the whole occlusion device is compressed in a single-layer net shape.

As shown in fig. 2, the proximal marker 1 is attached to the neck portion beyond the end of the elastic mesh body 2. The proximal marker 1 is cylindrical or a cylindrical housing closed at one end or wire-like. The proximal marker 1 and the end portion assembly of the neck elastic mesh body 2 may be fixedly connected by any one of a press-riveting method, an adhesive method, a welding method, a hot-melting method, and the like. The proximal marker 1 is made of a radiopaque material.

As shown in fig. 2, the distal marker 4 is connected to the gathering portion where the end of the elastic mesh body 3 of the expansion portion is gathered inward, and the distal marker 4 is cylindrical or has a cylindrical shell with one end closed or has a wire shape. The distal marker 4 and the end portion of the expanded portion elastic mesh body 3 may be fixedly connected by any one of a press-riveting method, an adhesive method, a welding method, a hot-melting method, and the like. The distal marker 4 is also made of a radiopaque material.

According to another preferred embodiment of the present invention, as shown in fig. 3, the proximal marker 1 can be connected to the inside of the end of the elastic net-shaped body 2 of the neck by reverse inward bending.

As previously mentioned, in accordance with another preferred embodiment of the present invention, a long neck occlusion device 20 is also provided, as shown in fig. 4-5. The long neck occluding device 20 differs from the short neck occluding device 10 in that the long neck occluding device 20 has a longer elastic mesh 2 of the neck, thereby providing more intra-tumor contact area and providing intra-tumor open segment tension. The diameter of expansion portion elasticity dictyosome 3 from the near-end to the distal end is grow gradually, and the similar outside rabbit ear that expands in cross-section for the elasticity of expansion portion is bigger, more is favorable to the support to stay in the tumour intracavity that the broad neck is straight, and the holding power of distal end is less, reduces tumour top rupture risk.

For the long-neck blocking device 20, the diameter of the neck elastic reticular body 2 is more than or equal to the diameter of the neck of the tumor cavity, and the preferred diameter is more than or equal to 0.5 mm; the perimeter is more than or equal to 1.5 mm. The length of the neck elastic reticular body 2 is more than or equal to 10 percent of the total height of the tumor, preferably more than or equal to 50 percent of the total height of the tumor. It should be understood that "total tumor height" herein refers to the size of the tumor body from the tumor top 104 to the tumor neck opening 102 as shown in fig. 6.

Preferably, the cross-sectional perimeter of the expandable section elastic mesh body 3 at the distal end of the long neck occlusion device 20 is smaller, and the length of the expandable section elastic mesh body 3 is less than or equal to 50% of the total height of the tumor, preferably less than or equal to 30% of the total height of the tumor.

Preferably, the maximum diameter of the elastic reticular body 3 of the expansion part is more than or equal to the maximum size in the tumor cavity, and the preferred diameter is more than or equal to 0.5 mm; the perimeter is more than or equal to 1.5 mm.

While the long neck occlusive device 20 shown in fig. 4-5 does not show a connecting wire 5, it should be understood that the connecting wire 5 may be added accordingly as needed to better maintain the proximal and distal shapes when stretched.

Referring to fig. 6 and 7, there are shown schematic views of the short neck occlusion device 10 and the long neck occlusion device 20 provided according to the preferred embodiment described above, after they have been implanted in an aneurysm. In clinical application, the conventional electrolytic desorption delivery system (such as CN208130024U, etc.) or mechanical delivery system on the market can be used for cooperating delivery, and the delivery system is only briefly described herein since the delivery system is not the innovation point of the present invention.

In the pre-delivery state, the proximal marker portion 1 is connected to the delivery system and the occluding device is stretched into an elongated body for placement within a sheath of the delivery system.

In operation, the elongated body is delivered into the tumor cavity 103 through the tumor neck 101 along the inside of the micro-catheter, and the occlusion device is slowly pushed at a proper position in the tumor cavity 103, so that the occlusion device is expanded in the tumor cavity 103. After the device is unfolded, the neck elastic net body 2 is attached to the inner wall of the tumor neck 101, the expansion part elastic net body 3 is attached to the inner wall of the tumor cavity 103, and whether the position or other marking silk threads are proper is confirmed through the near-end marking part 1 and the far-end marking part 4 of the occlusion device, so that the near-end marking part 1 is flush with the outer end of the tumor neck opening 102, and the far-end marking part 4 is not contacted with the tumor top 104. If the neck elastic reticular body 2 does not tightly clamp the neck opening 102, the blocking device can be further pushed and pulled by the conveying system, the position is adjusted to achieve the blocking effect, after the blocking is finished, the conveying system is separated from the blocking device, and the conveying system is withdrawn, so that the implantation of the blocking device is finished.

According to the utility model provides an aneurysm blocking device can provide effectual support at the tumour neck, plays the effect of similar stopper, and takes place for lessly in carrying the tumour artery, reduces arterial thrombosis's possibility, and is comparatively reasonable at tumour intracavity tension, can reduce the weak risk of easily breaking in tumour top, can be better support and shutoff to wide carotid aneurysm and branching portion aneurysm homoenergetic, plays satisfactory treatment.

What has been described above is only the preferred embodiment of the present invention, not for limiting the scope of the present invention, but various changes can be made to the above-mentioned embodiment of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. The present invention is not described in detail in the conventional technical content.

Claims (10)

1. An aneurysm occlusion device is characterized in that the aneurysm occlusion device is formed by an elastic reticular body, the near end of the elastic reticular body is folded inwards in the radial direction and is connected with a near end marking part, the far end of the elastic reticular body is folded inwards in the radial direction and is connected with a far end marking part and is folded reversely, so that the far end of the elastic reticular body where the far end marking part is located extends into the elastic reticular body, a double-layer reticular structure formed by the reverse folding forms the elastic reticular body of an expansion part, and a single-layer reticular structure which is not folded reversely forms the elastic reticular body of a neck part; in the self-expanding state, the radial dimension of the elastic reticular body of the expansion part is gradually increased from the proximal end to the distal end, or is increased and then decreased.

2. The aneurysm occlusion device of claim 1, wherein the aneurysm occlusion device comprises a short neck occlusion device and a long neck occlusion device, based on a size ratio of the expandable portion elastic mesh body to the neck elastic mesh body.

3. The aneurysm occlusion device of claim 2, wherein for the short neck occlusion device, the diameter of the elastic mesh body of the neck is equal to or greater than the diameter of the neck, and the length of the elastic mesh body of the neck is equal to or greater than the height of the neck; the diameter of the elastic reticular body of the expansion part at the position with the largest radial dimension is more than or equal to the largest radial dimension of the tumor cavity.

4. The aneurysm occlusion device of claim 3, wherein the diameter of the elastic cervical mesh is greater than or equal to 0.5mm and the length of the elastic cervical mesh is greater than 0.5mm for the short neck occlusion device.

5. The aneurysm occlusion device of claim 4, wherein for the short neck occlusion device, the diameter of the expanded portion elastic mesh body where the radial dimension is largest is greater than or equal to 0.5mm, and the circumference of the expanded portion elastic mesh body is greater than or equal to 1.5 mm.

6. The aneurysm occlusion device of claim 2, wherein the diameter of the neck elastic mesh body is equal to or greater than the diameter of the neck of the aneurysm, the length of the neck elastic mesh body is equal to or greater than 10% of the total height of the aneurysm, the length of the expansion portion elastic mesh body is equal to or less than 50% of the total height of the aneurysm, and the diameter of the expansion portion elastic mesh body at the maximum radial dimension is equal to or greater than the maximum radial dimension in the aneurysm cavity.

7. The aneurysm occlusion device of claim 6, wherein the diameter of the elastic mesh body of the neck is no less than 0.5mm and the circumference of the elastic mesh body of the neck is no less than 1.5mm for the long neck occlusion device.

8. The aneurysm occlusion device of claim 7, wherein the length of the elastic mesh body of the expansion portion is no greater than 30% of the total height of the aneurysm, the diameter of the elastic mesh body of the expansion portion at the maximum radial dimension is no less than 0.5mm, and the circumference is no less than 1.5 mm.

9. The aneurysm occlusion device of claim 1, wherein the proximal and distal markers are connected by a connecting wire.

10. The aneurysm occlusion device of claim 1, wherein the elastic mesh body is obtained by braiding a plurality of wires or braiding a single wire, or tubular cutting, or sheet molding; the surface of the elastic reticular body is adhered with a medicine, and the medicine comprises: the medicine is applied to the surface of the elastic reticular body by adopting spraying, dip-coating and electrostatic adsorption.

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